Global Existence and Vanishing Dispersion Limit of Strong/Classical Solutions to the One-dimensional Compressible Quantum Navier-Stokes Equations with Large Initial Data

IF 1.3 3区 数学 Q2 MATHEMATICS, APPLIED
Zhengzheng Chen, Huijiang Zhao
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引用次数: 0

Abstract

We are concerned with the global existence and vanishing dispersion limit of strong/classical solutions to the Cauchy problem of the one-dimensional isentropic compressible quantum Navier-Stokes equations, which consists of the compressible Navier-Stokes equations with a linearly density-dependent viscosity and a nonlinear third-order differential operator known as the quantum Bohm potential. The pressure \(p(\rho )=\rho ^\gamma \) is considered with \(\gamma \ge 1\) being a constant. We focus on the case when the Planck constant \(\varepsilon \) and the viscosity constant \(\nu \) are not equal. Under some suitable assumptions on \(\varepsilon , \nu , \gamma \), and the initial data, we proved the global existence and large-time behavior of strong and classical solutions away from vacuum to the compressible quantum Navier-Stokes equations with arbitrarily large initial data. This result extends the previous ones on the construction of global strong large-amplitude solutions of the compressible quantum Navier-Stokes equations to the case \(\varepsilon \ne \nu \). Moreover, the vanishing dispersion limit for the classical solutions of the quantum Navier-Stokes equations is also established with certain convergence rates. The proof is based on a new effective velocity which converts the quantum Navier-Stokes equations into a parabolic system, and some elaborate estimates to derive the uniform-in-time positive lower and upper bounds on the specific volume.

具有大初始数据的一维可压缩量子Navier-Stokes方程强/经典解的整体存在性和消失色散极限
我们关注一维等熵可压缩量子Navier-Stokes方程的Cauchy问题的强解/经典解的全局存在性和消失色散极限,该方程由具有线性密度依赖粘度的可压缩Navier-Stokes方程和称为量子Bohm势的非线性三阶微分算子组成。压力\(p(\rho )=\rho ^\gamma \)被认为是一个常数\(\gamma \ge 1\)。我们关注的是普朗克常数\(\varepsilon \)和粘度常数\(\nu \)不相等的情况。在\(\varepsilon , \nu , \gamma \)和初始数据的适当假设下,我们证明了具有任意大初始数据的可压缩量子Navier-Stokes方程在远离真空的强解和经典解的全局存在性和大时性。该结果将先前关于构造可压缩量子Navier-Stokes方程全局强振幅解的结果推广到\(\varepsilon \ne \nu \)情况。此外,还建立了具有一定收敛速率的量子Navier-Stokes方程经典解的消失色散极限。该证明是基于将量子Navier-Stokes方程转化为抛物系统的一种新的有效速度,以及一些精细的估计来推导出比体积的及时均匀正下界和上界。
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来源期刊
CiteScore
2.00
自引率
15.40%
发文量
97
审稿时长
>12 weeks
期刊介绍: The Journal of Mathematical Fluid Mechanics (JMFM)is a forum for the publication of high-quality peer-reviewed papers on the mathematical theory of fluid mechanics, with special regards to the Navier-Stokes equations. As an important part of that, the journal encourages papers dealing with mathematical aspects of computational theory, as well as with applications in science and engineering. The journal also publishes in related areas of mathematics that have a direct bearing on the mathematical theory of fluid mechanics. All papers will be characterized by originality and mathematical rigor. For a paper to be accepted, it is not enough that it contains original results. In fact, results should be highly relevant to the mathematical theory of fluid mechanics, and meet a wide readership.
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